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G. G. Kasparov 《K-Theory》1991,5(1):47-49
We provide a straightforward proof of one of the main results of the Baum-Douglas K-homology theory: If A is a separable nuclear C
*-algebra and I an ideal of A, then the natural restriction map K
0(A, I) K
0(I) is an isomorphism of Abelian groups. 相似文献
3.
Results of a simulation of setups intended to search for excited states of few-nucleon systems decaying into two clusters are presented. 相似文献
4.
Giovanni Giachetta Luigi Mangiarotti Gennadi Sardanashvily 《International Journal of Theoretical Physics》1999,38(10):2703-2717
We show that any second-order dynamic equationon a configuration space X R ofnonrelativistic time-dependent mechanics can be seen asa geodesic equation with respect to some (nonlinear)connection on the tangent bundle TX X of relativisticvelocities. We compare relativistic and nonrelativisticgeodesic equations, and study the Jacobi vector fieldsalong nonrelativistic geodesics. 相似文献
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A. Kovarski T. Yushkina V. Kasparov A. Shapiro A. Tikhonov 《Colloid and polymer science》2003,281(4):308-318
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Maria Buchweitz Gennadi Gudi Reinhold Carle Dietmar R. Kammerer Hartwig Schulz 《Journal of Raman spectroscopy : JRS》2012,43(12):2001-2007
The FT‐Raman spectra of the chloride salts of pelargonidin‐3‐glucoside, cyanidin‐3‐glucoside and delphinidin‐3‐glucoside, their structures at pH 5.0 and their interaction with aluminium and ferric ions are presented for the first time and discussed with regard to their spectroscopic response. Two marker bands at approximately 1510 and 1330/1350 cm−1 and one band at approximately 1330/1350 cm−1 were identified being characteristic for the formation of ferric and aluminium chelates, respectively, of cyanidin‐3‐glucoside and delphinidin‐3‐glucoside. In contrast, pelargonidin‐3‐glucoside, exhibiting one single hydroxyl group in the B‐ring, did not form metal chelates, which could be clearly demonstrated by missing marker bands. The formation of anthocyanin–metal chelates was also verified in model systems containing commercial sugar beet pectin and a pectic polysaccharide fraction isolated thereof, respectively. In addition, the absence of anthocyanin–metal chelates in systems prepared with citrate buffer was confirmed, and the effects of low and high methoxylated citrus pectins on chelate formation were studied. Copyright © 2012 John Wiley & Sons, Ltd. 相似文献
9.
We show that the complex Radon transform realizes an isomorphism between the quotient-space of residual ${\bar\partial}$ -cohomologies of a locally complete intersection algebraic subvariety in a linearly concave domain of ${{{\mathbb C}}P^n}$ and the space of holomorphic solutions of the associated homogeneous system of differential equations with constant coefficients in the dual domain in ${({{\mathbb C}}P^n)^*}$ . 相似文献
10.
Eric S. Tillman Gennadi G. Nossarev Thieo E. Hogen‐Esch 《Journal of polymer science. Part A, Polymer chemistry》2001,39(18):3121-3129
The direct and nearly quantitative incorporation of 9,10‐anthracenylidene (AN) chromophores into polystyrene occurred via the reaction of polystyryllithium (PSLi) with 9,10‐bis(chloromethyl)anthracene (BCMA) at ?78 °C in tetrahydrofuran (THF)/ hexane containing between 30 and 40 vol % hexane. Although the reaction of PSLi and BCMA or 9,10‐bis(bromomethyl)anthracene (BBMA) in THF at ?78 °C gave nearly quantitative coupling, typically only 30–50% AN incorporation was observed, as determined by ultraviolet–visible spectrometry. Model coupling reactions of 3,3‐dimethyl‐1,1‐diphenyl‐1‐lithiobutane, (1,1,2,2‐tetramethyl)propylcyclopentadienyllithium, 9‐methylfluorenyllithium, and triphenylmethyllithium with BCMA or BBMA at ?78 °C in THF in nearly all cases gave several AN‐containing coupling products. This was consistent with lithium–halogen exchange leading to the linking of multiple AN groups. © 2001 John Wiley & Sons, Inc. J Polym Sci Part A: Polym Chem 39: 3121–3129, 2001 相似文献